Reaction kettle for preparing magnesium hydroxide for flame-retardant PVC (polyvinyl chloride)

Abstract

The utility model relates to the field of magnesium hydroxide reaction kettle equipment, and discloses a reaction kettle for preparing magnesium hydroxide for flame-retardant PVC (Polyvinyl Chloride), which comprises a reaction kettle body and a bottom shell, the bottom shell is connected to the bottom of the reaction kettle body through a flange, a temperature control plate is embedded in the inner wall of the reaction kettle body, and a heating rod is spirally embedded in the temperature control plate. Temperature sensors are arranged on the upper portion and the lower portion of the inner wall of the temperature control plate, stirring blades are arranged in the middle of the interior of the reaction kettle body, the top ends of the stirring blades penetrate through the top wall of the reaction kettle body and are fixedly connected with a first motor, and a filtering assembly is arranged in the bottom shell. In the reaction kettle, the temperature control plate is combined with the temperature sensor and the heating rod, so that accurate constant temperature control can be performed on reaction materials in the reaction kettle body, and meanwhile, the stirring blades are driven by the first motor to realize efficient temperature control of magnesium hydroxide, so that accurate preparation of the magnesium hydroxide at normal temperature and normal pressure can be realized.

Description

Technical Field

[0001] The utility model relates to the field of magnesium hydroxide reaction kettle equipment, in particular to a reaction kettle for preparing magnesium hydroxide for flame-retardant PVC. Background Art

[0002] Magnesium hydroxide is a commonly used inorganic flame retardant filler. Adding it to PVC can effectively improve the flame retardant properties of PVC materials. It has the characteristics of low toxicity, no toxic gas, and good flame retardant effect. Magnesium hydroxide will produce water when heated, and the water vapor can disperse the combustible gas on the surface of the flame retardant to achieve the purpose of flame retardancy. The decomposed magnesium oxide will also cover the surface of the substrate to isolate oxygen, so magnesium hydroxide has important and extensive uses in industry.

[0003] In the current magnesium hydroxide processing steps, magnesium hydroxide is prepared by hydrating magnesium oxide, but this preparation method requires pressure stabilization, which is bound to have relatively high requirements on equipment and process. Therefore, the present application proposes a magnesium hydroxide preparation reactor for flame retardant PVC, which utilizes magnesium oxide hydration to prepare magnesium hydroxide at room temperature and pressure. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a reaction kettle for preparing magnesium hydroxide for flame-retardant PVC.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a reactor for preparing magnesium hydroxide for flame-retardant PVC, comprising a reactor body and a bottom shell, the bottom shell flange is connected to the bottom of the reactor body, the inner wall of the reactor body is inlaid with a temperature control plate, the inner spiral of the temperature control plate is inlaid with a heating rod, the upper and lower parts of the inner wall of the temperature control plate are provided with temperature sensors, a stirring blade is provided in the middle part of the reactor body, the top end of the stirring blade penetrates the top wall of the reactor body and is fixedly connected to a first motor, the first motor is fixedly connected to the middle part of the outer top wall of the reactor body, and a filter assembly is provided inside the bottom shell.

[0006] As a further description of the above technical solution:

[0007] A water inlet is arranged on one side of the top wall of the reactor body, and a feed inlet is arranged on the other side of the top wall of the reactor body.

[0008] As a further description of the above technical solution:

[0009] A baffle is provided at the top of the filter assembly, and the baffle is fixedly connected to a second motor, and the second motor is fixedly connected to the inside of the filter assembly. The baffle is composed of two symmetrically arranged quarter sectors, and the top inlet of the filter assembly is composed of two stacked quarter sectors.

[0010] As a further description of the above technical solution:

[0011] A water outlet is arranged in the middle of the bottom end of the bottom shell.

[0012] As a further description of the above technical solution:

[0013] A discharge port is arranged on one side of the bottom shell.

[0014] As a further description of the above technical solution:

[0015] The heating rod is spiral-shaped.

[0016] As a further description of the above technical solution:

[0017] The bottom of the bottom shell is evenly distributed with supporting legs.

[0018] The utility model has the following beneficial effects:

[0019] In the utility model, the temperature control plate is combined with the temperature sensor and the heating rod to realize accurate and constant temperature control of the reaction bore inside the reactor body. At the same time, the stirring blade driven by the first motor is combined to realize efficient temperature control of magnesium hydroxide. In this way, accurate preparation of magnesium hydroxide can be realized at normal temperature and pressure, with low requirements on equipment and process, and efficient and effective preparation of magnesium hydroxide is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a stereoscopic diagram of a reaction kettle for preparing magnesium hydroxide for flame-retardant PVC proposed by the utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of a reaction kettle for preparing magnesium hydroxide for flame-retardant PVC proposed in the utility model;

[0022] Figure 3 A three-dimensional diagram of a heating rod of a reaction kettle for preparing magnesium hydroxide for flame-retardant PVC proposed in the utility model;

[0023] Figure 4 This is a top view of a filter assembly of a reaction kettle for preparing magnesium hydroxide for flame-retardant PVC proposed by the utility model;

[0024] Figure 5 for Figure 2 Enlarged view of point A in the middle.

[0025] Legend:

[0026] 1. Reactor body; 2. Feed inlet; 3. First motor; 4. Water inlet; 5. Bottom shell; 6. Support legs; 7. Water outlet; 8. Discharge outlet; 9. Temperature control plate; 10. Heating rod; 11. Temperature sensor; 12. Stirring blade; 13. Filter assembly; 14. Shield; 15. Second motor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figure 1-Figure 5 The utility model provides an embodiment: a reactor for preparing magnesium hydroxide for flame-retardant PVC, comprising a reactor body 1 and a bottom shell 5, the bottom shell 5 is flange-connected to the bottom of the reactor body 1, the inner wall of the reactor body 1 is inlaid with a temperature control plate 9, the inner spiral of the temperature control plate 9 is inlaid with a heating rod 10, the upper and lower parts of the inner wall of the temperature control plate 9 are both provided with temperature sensors 11, a stirring blade 12 is provided in the middle of the reactor body 1, the top of the stirring blade 12 penetrates the top wall of the reactor body 1 and is fixedly connected to a first motor 3, the first motor 3 is fixedly connected to the middle of the outer top wall of the reactor body 1, a filter assembly 13 is provided inside the bottom shell 5, through precise temperature control and monitoring, as well as precise stirring combined with the stirring blade 12, efficient reaction of materials can be achieved, the prepared magnesium hydroxide has high purity, and is subsequently added to the PVC raw material to effectively improve the flame retardant performance of the PVC material.

[0029] A water inlet 4 is provided on one side of the top wall of the reactor body 1, and the water inlet 4 is used to introduce water into the reactor body 1. A feed port 2 is provided on the other side of the top wall of the reactor body 1, and the feed port 2 is used to introduce magnesium oxide raw material into the reactor body 1. A baffle 14 is provided on the top of the filter component 13, and the baffle 14 is fixedly connected to the second motor 15, and the second motor 15 is fixedly connected to the inside of the filter component 13. The baffle 14 is composed of two symmetrically arranged quarter sectors, and the top inlet of the filter component 13 is composed of two stacked quarter sectors. A water outlet 7 is provided in the middle of the bottom end of the bottom shell 5, and a discharge port 8 is provided on one side of the bottom shell 5. The heating rod 10 is spiral, and the spiral heating rod 10 can realize uniform and sufficient heating of the bottom of the reactor body 1 to ensure the normal reaction of the material at normal temperature and pressure. The bottom of the bottom shell 5 is evenly distributed with legs 6.

[0030] Working principle: When the magnesium hydroxide reactor for PVC flame retardant is in use, firstly, raw materials are added into the reactor body 1 through the feed port 2 and the water inlet 4. At the same time, the heating rod 10 works to realize the temperature control class 9 to heat the materials. Then the temperature sensor 11 can sense the temperature inside the reactor body 1 to realize the precise heating and temperature monitoring of the materials in the reactor body 1. The first motor 3 stirs the materials inside the reactor body 1 through the stirring blades 12 to make them fully heated and evenly. The reaction temperature of magnesium oxide hydration to magnesium hydroxide under normal pressure is ninety degrees Celsius. After the reaction is completed, the second motor 15 works to realize the shutter 14 to open the top feed of the filter component 13. The filter component filters the magnesium hydroxide, and the sewage flows out from the outlet 7.

[0031] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A reaction kettle for preparing magnesium hydroxide for flame-retardant PVC, comprising a reaction kettle body (1) and a bottom shell (5), characterized in that: The bottom shell (5) is flange-connected to the bottom of the reactor body (1); the inner wall of the reactor body (1) is inlaid with a temperature control plate (9); a heating rod (10) is spirally inlaid inside the temperature control plate (9); temperature sensors (11) are arranged at the upper and lower parts of the inner wall of the temperature control plate (9); a stirring blade (12) is arranged in the middle of the reactor body (1); the top end of the stirring blade (12) penetrates the top wall of the reactor body (1) and is fixedly connected to a first motor (3); the first motor (3) is fixedly connected to the middle part of the outer top wall of the reactor body (1); and a filter assembly (13) is arranged inside the bottom shell (5).

2. A reaction kettle for preparing magnesium hydroxide for flame-retardant PVC according to claim 1, characterized in that: A water inlet (4) is provided on one side of the top wall of the reactor body (1), and a feed inlet (2) is provided on the other side of the top wall of the reactor body (1).

3. A reaction kettle for preparing magnesium hydroxide for flame-retardant PVC according to claim 1, characterized in that: A baffle (14) is provided at the top of the filter assembly (13), the baffle (14) is fixedly connected to a second motor (15), the second motor (15) is fixedly connected inside the filter assembly (13), the baffle (14) is composed of two symmetrically arranged quarter sectors, and the top inlet of the filter assembly (13) is composed of two stacked quarter sectors.

4. A reaction kettle for preparing magnesium hydroxide for flame-retardant PVC according to claim 1, characterized in that: A water outlet (7) is provided in the middle of the bottom end of the bottom shell (5).

5. A reaction kettle for preparing magnesium hydroxide for flame-retardant PVC according to claim 1, characterized in that: A discharge port (8) is provided on one side of the bottom shell (5).

6. A reaction kettle for preparing magnesium hydroxide for flame-retardant PVC according to claim 1, characterized in that: The heating rod (10) is spiral-shaped.

7. A reaction kettle for preparing magnesium hydroxide for flame-retardant PVC according to claim 1, characterized in that: The bottom of the bottom shell (5) is evenly distributed with supporting legs (6).

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